Add parser for iOS Discord and SQLite parser for iOS Instagram

[jawahirulwildan]

One line description of pull request

Add parser for iOS Discord and SQLite parser for iOS Instagram

Description:

I add and modify several files:

• Add import ios_discord to plaso/parsers/__init__.py

• Add a new parser ios_discord.py to plaso/parsers/

• Add unit test ios_discord.py to tests/parsers/

• Add formatter support for iOS Discord parser to plaso/data/formatters/ios.yaml

• Add timeliner support for iOS Discord parser to plaso/data/timeliner.yaml

• Add 23AAD8D4-D632-4F99-8E44-152AAB8FA9D6 file for iOS Discord parsers to test_data/

• Add import ios_instagram to plaso/parsers/sqlite_plugins/__init__.py

• Add a new parser plugin ios_instagram.py to plaso/parsers/sqlite_plugins/

• Add unit test ios_instagram.py to tests/parsers/sqlite_plugins/

• Add formatter support for iOS Instagram parser plugin to plaso/data/formatters/ios.yaml

• Add timeliner support for iOS Instagram parser plugin to plaso/data/timeliner.yaml

• Add 9368974384.db files for iOS Instagram parser plugin to test_data/

Related issue (if applicable): fixes #

Notes:

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This makes sure that the code has appropriate test coverage and conforms to the
Plaso style guide.

One of the maintainers will examine your code, and may request changes. Check off the items below in
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Checklist:

• No new new dependencies are required or l2tdevtools has been updated.
• Test data has a Plaso compatible license. If the test data was not authored by you (the contributor), make sure to mention its orginal source in ACKNOWLEDGEMENTS.
• Reviewer assigned.
• Automated checks (GitHub Actions, AppVeyor) pass.