playground: fix can not set runtime config in config file & set TiFlash logger level to debug

[Lloyd-Pottiger]

What problem does this PR solve?

What is changed and how it works?

1. Fix can not set runtime config in config file specific by --tiflash.config

now:

2. Since TiFlash has changed the default logger level to INFO, explicitly set the TiFlash logger level to DEBUG in TiUP playground to debug more easily.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release notes:

NONE

[Lloyd-Pottiger]

/cc @JaySon-Huang

[ti-chi-bot[bot]]

@Lloyd-Pottiger: GitHub didn't allow me to request PR reviews from the following users: JaySon-Huang.

Note that only pingcap members and repo collaborators can review this PR, and authors cannot review their own PRs.

In response to [this](https://github.com/pingcap/tiup/pull/2346#issuecomment-1871674400): >/cc @JaySon-Huang Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[codecov-commenter]

Codecov Report

Attention: 38 lines in your changes are missing coverage. Please review.

Comparison is base (0c6dda9) 55.40% compared to head (61ead98) 55.35%.

:exclamation: Current head 61ead98 differs from pull request most recent head 9bf6048. Consider uploading reports for the commit 9bf6048 to get more accurate results

Files	Patch %	Lines
components/playground/instance/tiflash.go	0.00%	37 Missing :warning:
components/playground/instance/tiflash_config.go	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2346 +/- ## ========================================== - Coverage 55.40% 55.35% -0.05% ========================================== Files 329 329 Lines 34845 34865 +20 ========================================== - Hits 19304 19297 -7 - Misses 13232 13257 +25 - Partials 2309 2311 +2 ``` | [Flag](https://app.codecov.io/gh/pingcap/tiup/pull/2346/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | Coverage Δ | | |---|---|---| | [playground](https://app.codecov.io/gh/pingcap/tiup/pull/2346/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `15.34% <0.00%> (-0.03%)` | :arrow_down: | | [tiup](https://app.codecov.io/gh/pingcap/tiup/pull/2346/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `33.60% <ø> (-0.05%)` | :arrow_down: | | [unittest](https://app.codecov.io/gh/pingcap/tiup/pull/2346/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `22.34% <ø> (-<0.01%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap#carryforward-flags-in-the-pull-request-comment) to find out more.

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[Lloyd-Pottiger]

/cc @breezewish

[ti-chi-bot[bot]]

@JaySon-Huang: adding LGTM is restricted to approvers and reviewers in OWNERS files.

In response to [this](https://github.com/pingcap/tiup/pull/2346#pullrequestreview-1798607107): >LGTM Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[breezewish]

Just curious, in what case do we need to override the runtime config in the config file? AFAIK for TiKV and TiDB these runtime configurations (like port) are also specified via parameters so that it will not be overridden by config files.

[Lloyd-Pottiger]

Just curious, in what case do we need to override the runtime config in the config file? AFAIK for TiKV and TiDB these runtime configurations (like port) are also specified via parameters so that it will not be overridden by config files.

case like:

My tiup installed in /data1, but /data1 is full and /data2 is almost empty

[breezewish]

/lgtm

[Lloyd-Pottiger]

/approve

[Lloyd-Pottiger]

/assign @kaaaaaaang

[kaaaaaaang]

/approve

[kaaaaaaang]

/lgtm /approve

[kaaaaaaang]

/lgtm

[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-01-05 01:53:08.00379424 +0000 UTC m=+2394679.041021182: :ballot_box_with_check: agreed by breezewish.
• 2024-01-09 12:57:08.45415099 +0000 UTC m=+361618.038404678: :heavy_multiplication_x::repeat: reset by ti-chi-bot[bot].
• 2024-01-11 08:16:29.645276735 +0000 UTC m=+517579.229530422: :ballot_box_with_check: agreed by kaaaaaaang.

[kaaaaaaang]

/approve

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kaaaaaaang, Lloyd-Pottiger

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