OCPEDGE-1005: must-gather: add support for --since and --since-time flags

[suleymanakbas91]

oc adm must-gather has new flags --since and --since-time, which set MUST_GATHER_SINCE and MUST_GATHER_SINCE_TIME environment vars to limit log collection based on a specified time. This PR adds support for these flags to LVMS must-gather.

[openshift-ci-robot]

@suleymanakbas91: This pull request references OCPEDGE-1005 which is a valid jira issue.

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In response to this:

oc adm must-gather has new flags --since and --since-time, which set MUST_GATHER_SINCE and MUST_GATHER_SINCE_TIME environment vars to limit log collection based on a specified time. This PR adds support for these flags to LVMS must-gather.

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.75%. Comparing base (d36d392) to head (619ec5f).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #616      +/-   ##
==========================================
+ Coverage   77.65%   77.75%   +0.10%     
==========================================
  Files          27       27              
  Lines        1960     1960              
==========================================
+ Hits         1522     1524       +2     
+ Misses        320      319       -1     
+ Partials      118      117       -1     

see 1 file with indirect coverage changes

[openshift-ci]

@suleymanakbas91: all tests passed!

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[jakobmoellerdev]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jakobmoellerdev, suleymanakbas91

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