fix: replace RtidbSchema keywords to PBSchema

[mangoGoForward]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
  Bug fix

• What is the current behavior? (You can also link to an open issue here)
  Fix Rename RtidbSchema to PBSchema #1866

• What is the new behavior (if this is a feature change)?
  Use PBSchema instead of RtidbSchema

[mangoGoForward]

Hi @aceforeverd ,one CI failed, seems network unreachable.
HTTPSConnectionPool(host='pypi.tuna.tsinghua.edu.cn', port=443): Read timed out

[aceforeverd]

Hi @aceforeverd ,one CI failed, seems network unreachable. HTTPSConnectionPool(host='pypi.tuna.tsinghua.edu.cn', port=443): Read timed out

yes, don't worry, the problem does not relate to this PR

[github-actions]

SDK Test Report

  75 files    75 suites   6m 20s ⏱️
176 tests 173 ✔️ 3 💤 0 ❌
217 runs  214 ✔️ 3 💤 0 ❌

Results for commit b911d74.

♻️ This comment has been updated with latest results.

[github-actions]

Linux Test Report

       57 files       187 suites   1h 13m 29s ⏱️
  8 549 tests   8 541 ✔️ 8 💤 0 ❌
12 535 runs  12 527 ✔️ 8 💤 0 ❌

Results for commit b911d74.

[codecov]

Codecov Report

Merging #1867 (b911d74) into main (4c5540f) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main    #1867      +/-   ##
============================================
- Coverage     73.77%   73.75%   -0.03%     
  Complexity      347      347              
============================================
  Files           615      615              
  Lines        120392   120392              
  Branches       1021     1021              
============================================
- Hits          88820    88795      -25     
- Misses        31363    31388      +25     
  Partials        209      209              

Impacted Files	Coverage Δ
src/sdk/sql_cluster_router.h	83.33% <ø> (ø)
src/catalog/sdk_catalog_test.cc	100.00% <100.00%> (ø)
src/sdk/sql_cluster_router.cc	54.97% <100.00%> (-0.30%)	⬇️
...s/query_response_time/deploy_query_response_time.h	81.25% <0.00%> (-18.75%)	⬇️
...atistics/query_response_time/query_response_time.h	78.26% <0.00%> (-4.35%)	⬇️
.../query_response_time/deploy_query_response_time.cc	97.10% <0.00%> (-2.90%)	⬇️
src/zk/dist_lock.cc	81.81% <0.00%> (-1.52%)	⬇️
src/sdk/db_sdk.cc	61.67% <0.00%> (-0.91%)	⬇️
src/log/log_reader.cc	78.52% <0.00%> (-0.59%)	⬇️
... and 6 more

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