Fix the default values of pipecd manifest

[Warashi]

What this PR does / why we need it:

Fix the default values to correct the OpenTelemetry Collector's exporter and the Grafana Tempo's remote_write target URL. Without this PR, the control plane whose release name is not 'pipecd' cannot handle the OpenTelemetry Traces.

Which issue(s) this PR fixes:

Fixes #4977

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 22.93%. Comparing base (a12ab46) to head (fb0b866). Report is 5 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #5188 +/- ## ======================================= Coverage 22.93% 22.93% ======================================= Files 419 419 Lines 44986 44986 ======================================= + Hits 10316 10318 +2 + Misses 33876 33873 -3 - Partials 794 795 +1 ```

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