Stable 26.3: MasterCI- drop unused store_data.py pre-hook to unblock Finish Workflow on large merges

[CarlosFelipeOR]

store_data.py writes changed_files, build_digest, and master_track_commits_sha into JOB_KV_DATA, which gets propagated through outputs.data to all ~120 jobs.

None of these are consumed in MasterCI (enable_job_filtering_by_changes=False, not a PR, and perf/llvm-coverage jobs are commented out), and on large merges (e.g. LTS rebases) changed_files grows enough to break Finish Workflow with Maximum object size exceeded.

Changelog category (leave one):

• CI Fix or Improvement (changelog entry is not required)

CI/CD Options

Exclude tests:

• Fast test
• Integration Tests
• Stateless tests
• Stateful tests
• Performance tests
• Aarch64 tests
• All with ASAN
• All with TSAN
• All with MSAN
• All with UBSAN
• All with Coverage
• All Regression
• Disable CI Cache

Regression jobs to run:

• Fast suites (mostly <1h)
• Aggregate Functions (2h)
• Alter (1.5h)
• Benchmark (30m)
• ClickHouse Keeper (1h)
• Iceberg (2h)
• LDAP (1h)
• OAuth (5m)
• Parquet (1.5h)
• RBAC (1.5h)
• SSL Server (1h)
• S3 (2h)
• S3 Export (2h)
• Swarms (30m)
• Tiered Storage (2h)

[github-actions]

Workflow [PR], commit [d955794]