[Chore] Add tests for Tempo single tenant oauth

[IshwarKanse]

• Add test cases for TempoStack and Monolithic Tempo with single tenant oauth.
• Add test case for Monolithic instance with route enabled and check the Monolithic instance enables oauth by default.

Tested on OpenShift 4.14

--- PASS: chainsaw (1503.82s)
    --- PASS: chainsaw/ossm-monolithic-otel (328.39s)
    --- PASS: chainsaw/ossm-tempostack (349.48s)
    --- PASS: chainsaw/ossm-tempostack-otel (393.22s)
    --- PASS: chainsaw/monitoring (206.07s)
    --- PASS: chainsaw/red-metrics (226.67s)
    --- PASS: chainsaw/monolithic-route (76.89s)
    --- PASS: chainsaw/monolithic-memory (97.02s)
    --- PASS: chainsaw/monolithic-ingestion-mtls (99.34s)
    --- PASS: chainsaw/monolithic-multitenancy-openshift (99.34s)
    --- PASS: chainsaw/monolithic-single-tenant-auth (109.93s)
    --- PASS: chainsaw/route (147.23s)
    --- PASS: chainsaw/tempo-single-tenant-auth (157.33s)
    --- PASS: chainsaw/receivers-mtls (159.77s)
    --- PASS: chainsaw/monolithic-multitenancy-static (110.21s)
    --- PASS: chainsaw/gateway (67.53s)
    --- PASS: chainsaw/generate (68.82s)
    --- PASS: chainsaw/monolithic-s3-tls (122.78s)
    --- PASS: chainsaw/reconcile (134.38s)
    --- PASS: chainsaw/multitenancy (166.46s)
    --- PASS: chainsaw/receivers-tls (171.47s)
    --- PASS: chainsaw/monolithic-pv (114.97s)
    --- PASS: chainsaw/custom-ca (147.15s)
    --- PASS: chainsaw/compatibility (158.69s)
PASS
Tests Summary...
- Passed  tests 23
- Failed  tests 0
- Skipped tests 0
Done.

[codecov-commenter]

Codecov Report

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

Project coverage is 76.41%. Comparing base (13e29ff) to head (9ef4da6).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #929 +/- ## ======================================= Coverage 76.41% 76.41% ======================================= Files 94 94 Lines 6071 6071 ======================================= Hits 4639 4639 Misses 1160 1160 Partials 272 272 ``` | [Flag](https://app.codecov.io/gh/grafana/tempo-operator/pull/929/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=grafana) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/grafana/tempo-operator/pull/929/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=grafana) | `76.41% <ø> (ø)` | | 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=grafana#carryforward-flags-in-the-pull-request-comment) to find out more.

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[IshwarKanse]

@rubenvp8510 Can you help to review and approve these tests. Added for both Monolithic and TempoStack single tenant with oauth.