Add date format to support offset in nuget analyser

[sahibamittal]

Description

Nuget Analyzer has list of two supported SimpleDateFormat which are allowed for parsing the dates being received from the repository, based on limited test data.

Now, as seen in logs, below date format is also received from the nugget repo. This date has offset dateTime and needs to be added to the list of supported formats in order to avoid the ParseException.

Date example: 1900-01-01T00:00:00+00:00
Format needed: yyyy-MM-dd'T'HH:mm:ss

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 added corresponding update logic
• This PR introduces new or alters existing behavior, and I have updated the documentation accordingly

[nscuro]

Thanks @sahibamittal! Could you please rebase with master again?

The test suite failed due to #3737, which has now been resolved via #3738.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00% (target: -1.00%)	✅ ∅ (target: 70.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (9ac6995)	21640	16399	75.78%
Head commit (a61c3d4)	21640 (+0)	16399 (+0)	75.78% (+0.00%)

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 (#3736)	0	0	∅ (not applicable)

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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