Fix ingester PVC data declaration to use configured value

[rajatvig]

What this PR does / why we need it:

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Checklist

• Documentation added
• Tests updated

[CLAassistant]

All committers have signed the CLA.

[codecov-io]

Codecov Report

Merging #3079 (3c079bd) into master (e9001d8) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3079      +/-   ##
==========================================
+ Coverage   62.86%   62.88%   +0.02%     
==========================================
  Files         186      186              
  Lines       15949    15949              
==========================================
+ Hits        10026    10030       +4     
+ Misses       4996     4988       -8     
- Partials      927      931       +4     

Impacted Files	Coverage Δ
pkg/querier/queryrange/limits.go	91.66% <0.00%> (-4.17%)	⬇️
pkg/querier/queryrange/downstreamer.go	95.29% <0.00%> (-2.36%)	⬇️
pkg/promtail/targets/file/filetarget.go	64.33% <0.00%> (-2.10%)	⬇️
pkg/promtail/positions/positions.go	58.51% <0.00%> (+11.70%)	⬆️

[sandeepsukhani]

Thanks for the PR!
LGTM