Port: Configurable email subject prefix

[leec94]

Description

porting issue DependencyTrack/dependency-track#3422

Addressed Issue

for porting issues #1190

Additional Details

need to port corresponding front end issue too DependencyTrack/frontend#720

Checklist

• I have read and understand the contributing guidelines
• This PR fixes a defect, and I have provided tests to verify that the fix is effective
• This PR implements an enhancement, and I have provided tests to verify that it works as intended
• This PR introduces changes to the database model, and I have updated the migration changelog accordingly
• This PR introduces new or alters existing behavior, and I have updated the documentation accordingly

[leec94]

i'm done fussing with this now, should be ready now for review + everything. you're so fast @nscuro 😆

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +2.67% (target: -1.00%)	✅ 100.00% (target: 70.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (6c774d4)	172	140	81.40%
Head commit (11f944f)	6741 (+6569)	5667 (+5527)	84.07% (+2.67%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1307)	4	4	100.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[leec94]

@nscuro the corresponding frontend issue https://github.com/DependencyTrack/frontend/pull/720/files is already in hyades-frontend repo. if there's a table for front end issues to port, you can mark this as already done

[nscuro]

@leec94 Thanks for the heads-up, I think that may be because hyades-frontend was forked sometime between DT v4.10 and v4.11. Looks like we already have some v4.11 changes in there...