Increase batch size of index backfilling

[Swatinem]

No description provided.

[codecov]

Codecov Report

Merging #56081 (c87f3ec) into master (f4b0523) will decrease coverage by 0.01%.
Report is 4 commits behind head on master.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #56081      +/-   ##
==========================================
- Coverage   79.98%   79.97%   -0.01%     
==========================================
  Files        5061     5061              
  Lines      217766   217784      +18     
  Branches    36864    36868       +4     
==========================================
+ Hits       174177   174181       +4     
- Misses      38243    38254      +11     
- Partials     5346     5349       +3     

Files Changed	Coverage
...tic/app/views/alerts/rules/metric/details/body.tsx	ø
...p/views/alerts/rules/metric/ruleConditionsForm.tsx	ø
static/app/views/alerts/rules/metric/ruleForm.tsx	ø
src/sentry/debug_files/artifact_bundle_indexing.py	100.00%