Update grafana/loki Docker tag to v2.7.2

This MR contains the following updates:

Package	Type	Update	Change
grafana/loki	ironbank-docker	patch	2.7.1 -> 2.7.2
grafana/loki		patch	2.7.1 -> 2.7.2
grafana/loki	stage	patch	2.7.1 -> 2.7.2

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Release Notes

grafana/loki

v2.7.2

Compare Source

Loki

Fixes

• 7926 MichelHollands: Fix bug in validation of pattern and regexp parsers where missing or empty parameters caused panics.
• 7720 sandeepsukhani: Fix bugs in processing delete requests with line filters.
• 7708 DylanGuedes: Fix bug in multi-tenant querying.

Notes

This release was created from a branch starting at commit 706c22e9e40b0156031f214b63dc6ed4e210abc1 but it may also contain backported changes from main.

Check the history of the branch release-2.7.x.

Dependencies

• Go version: 1.19.5

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