TSPS-691 Add Glimpse imputation pipeline

[mmorgantaylor]

Description

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Please explain the changes you made here.
Explain the motivation for making this change. What existing problem does the pull request solve?
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Checklist

If you can answer "yes" to the following items, please add a checkmark next to the appropriate checklist item(s) and notify our WARP team by tagging @broadinstitute/warp-admins in a comment on this PR.

• Did you add inputs, outputs, or tasks to a workflow?
• Did you modify, delete or move: file paths, file names, input names, output names, or task names?
• If you made a changelog update, did you update the pipeline version number?

[github-actions]

🔍Changelog Validation Results:

Comparing changelogs for pipelines that differ from the versions on 'origin/rm_glimpse_memory':
fatal: ambiguous argument '/home/runner/work/warp/warp/pipelines/wdl/glimpse/Glimpse2Imputation.changelog.md': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
All changelog files are valid for this release.

[github-actions]

🔍Changelog Validation Results:

Comparing changelogs for pipelines that differ from the versions on 'origin/rm_glimpse_memory':
All changelog files are valid for this release.