`mimir` is failing smoke tests in BB all-packages pipelines

Issue

When an all-packages pipeline is run in BB umbrella, mimir is failing to run its smoke tests.

Example MR with failing all-packages pipeline: big-bang/bigbang!5723 (closed)

Relevant logs:

Error: 1 error occurred:
	* job mimir-mimir-smoke-test failed: BackoffLimitExceeded'
++ sed -n '/Error:/,$p'
+ log_errors='Error: 1 error occurred:
	* job mimir-mimir-smoke-test failed: BackoffLimitExceeded'
+ [[ '' != \N\o\n\e ]]
+ [[ -n Error: 1 error occurred:
	* job mimir-mimir-smoke-test failed: BackoffLimitExceeded ]]

Acceptance Criteria

• mimir's smoke tests run and succeed in BB umbrella all-packages pipelines.