feat(spanner): add progress field to UpdateDatabaseDdlMetadata

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Synth log will be available here:
https://source.cloud.google.com/results/invocations/669c1fcb-cd86-40d3-903f-fcad30bc82fb/targets

• To automatically regenerate this PR, check this box. (May take up to 24 hours.)

PiperOrigin-RevId: 368426665
Source-Link: googleapis/googleapis@3b236df

[codecov]

Codecov Report

Merging #1063 (91868ac) into master (1d4eed4) will increase coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1063      +/-   ##
============================================
+ Coverage     85.24%   85.26%   +0.02%     
- Complexity     2658     2659       +1     
============================================
  Files           155      155              
  Lines         14453    14453              
  Branches       1362     1362              
============================================
+ Hits          12320    12324       +4     
+ Misses         1565     1562       -3     
+ Partials        568      567       -1     

Impacted Files	Coverage Δ	Complexity Δ
...spanner/admin/database/v1/DatabaseAdminClient.java	87.96% <ø> (ø)	72.00 <0.00> (ø)
...ain/java/com/google/cloud/spanner/SessionPool.java	89.12% <0.00%> (+0.19%)	72.00% <0.00%> (ø%)
.../google/cloud/spanner/SpannerExceptionFactory.java	89.81% <0.00%> (+1.85%)	49.00% <0.00%> (+1.00%)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1d4eed4...91868ac. Read the comment docs.