[fix](regression) Support forced replica golden in show create case

[shuke987]

What problem does this PR solve?

Issue Number: None

Related PR: None

Problem Summary:

test_show_create_table_and_views_nereids creates OLAP tables with replication_num=1 and compares the complete SHOW CREATE TABLE result with a static golden. In test environments configured with force_olap_table_replication_num=3, Doris correctly rewrites the effective allocation to three replicas, but the case still expects one replica and fails before reaching the remaining view, rollup, and CREATE LIKE checks.

This change reads the effective forced replica configuration and selects a complete replica-specific golden for the four table-level SHOW CREATE TABLE checks. Both the one-replica and three-replica variants retain the full DDL comparison; unsupported forced replica values fail explicitly instead of weakening the assertion.

Release note

None

Check List (For Author)

• Test

  • Regression test
  • Unit Test
  • Manual test (add detailed scripts or steps below)
  • No need to test or manual test. Explain why:
    • This is a refactor/code format and no logic has been changed.
    • Previous test can cover this change.
    • No code files have been changed.
    • Other reason

  Validation:

  • The target single case passed with forced replica 3 while generating the selected golden.
  • The target single case passed with both replica variants present and normal golden comparison enabled.
  • The replica-1 blocks exactly preserve the original master golden.

• Behavior changed:

  • No.
  • Yes.

• Does this need documentation?

  • No.
  • Yes.

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
• Add branch pick label

[hello-stephen]

Thank you for your contribution to Apache Doris.
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1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
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[shuke987]

run buildall

[shuke987]

/review

[github-actions]

Review result: request changes.

I found one regression-test correctness issue: the new replica-specific SHOW CREATE TABLE goldens cover non-cloud replica 1/3 output, but the same suite still runs in cloud P0 where SHOW CREATE TABLE emits cloud-specific properties. No existing inline review thread covered this.

Checkpoint summary: the change is narrow and has no production concurrency, lifecycle, persistence, FE/BE protocol, data-write, observability, or performance impact. The tag-block iterator can safely skip the unused replica variant, and the non-cloud forced-replica paths look consistent with checked-in configs. Test coverage is incomplete because cloud P0 output is not covered by the new expected blocks. No additional user focus was provided. Static review only; I did not run builds/tests per the review prompt.

[github-actions]

Corrected inline anchor for the request-changes finding.

The issue remains the same: cloud P0 still runs this suite, but cloud SHOW CREATE TABLE emits cloud-specific properties while the new replica-specific expected blocks are non-cloud-only.

[github-actions]

This still leaves the cloud P0 run broken. cloud_p0/conf/regression-conf-custom.groovy runs group p0, and the framework adds p0 to this suite from the show_p0 directory, so the suite is selected there. In that environment cloud_unique_id makes Config.isCloudMode() true, and Env.addOlapTablePropertyInfo() emits file_cache_ttl_seconds instead of replication_allocation/min_load_replica_num for SHOW CREATE TABLE. The new show_*_replica_1/3 blocks only contain the non-cloud property list, so the first quickRunTest will compare cloud output against the non-cloud golden before reaching the later checks. Please add/select cloud-specific SHOW CREATE blocks, skip this suite in cloud mode, or normalize the properties being compared.