fix(test): use the same value for reldir v1+v2

[skyzh]

Problem

part of #11067

#9516

My observation is that with the current value of settings, x86-v1 usually takes 30s, arm-v1 1m30s, x86-v2 1m, arm-v2 3m. But sometimes the system could run too slow and cause test to timeout on arm with reldir v2.

While I investigate what's going on and further improve the performance, I'd like to set both of them to use the same test input, so that it doesn't timeout and we don't abuse this test case as a performance test.

Summary of changes

Use the same settings for both test cases.

[github-actions]

7788 tests run: 7410 passed, 0 failed, 378 skipped (full report)

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Flaky tests (1)

Postgres 17

• test_replica_query_race: release-arm64-with-lfc

Code coverage* (full report)

• functions: 32.9% (8677 of 26390 functions)
• lines: 48.8% (73902 of 151415 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
6d83f7a at 2025-03-03T21:28:45.362Z :recycle:}

[alexanderlaw]

I've run "Build and Test with Sanitizers" against this branch and got much better timing for this test on ARM:
https://neon-github-public-dev.s3.amazonaws.com/reports/branch-skyzh-tune-relv2-test/13648665473/index.html#suites/158be07438eb5188d40b466b6acfaeb3/419408c26b1ebca4/
[release-pg17-v1], Duration: 2m 25s

https://neon-github-public-dev.s3.amazonaws.com/reports/branch-skyzh-tune-relv2-test/13648665473/index.html#suites/158be07438eb5188d40b466b6acfaeb3/8267a75bb212efed/
[release-pg17-v2], Duration: 1m 20s

For reference, the nightly run of the same workflow against main shows:
https://neon-github-public-dev.s3.amazonaws.com/reports/main/13644198179/index.html#suites/158be07438eb5188d40b466b6acfaeb3/7e9349d6ccb880eb/
[release-pg17-v1], Duration: 1m 49s

https://neon-github-public-dev.s3.amazonaws.com/reports/main/13644198179/index.html#suites/158be07438eb5188d40b466b6acfaeb3/ebbd164ec7b079af/
[release-pg17-v2], Duration: 4m 47s

That is, the duration of v2 decreased as expected, the change looks good to me.