[MM-891]: Added reporter and assignee fields in subscription filters

[Kshitij-Katiyar]

Summary

• Added reporter and assignee fields to subscriptions modal to filter subscription notifications.
• Added the reporter field to the issue create dialog modal if the project supports it.

This PR is a recreation of #890 since the creator of #890 has been inactive for a long time.

Screenshots

What to test

• Set up Jira Oauth & Webhook and connect to the Jira instance
• Create a subscription and add a filter for reporter/assignee
• Create an issue on Jira similar to the subscription created but with a different reporter/assignee, you should not receive the subscription update on the channel if you had chosen includes in the filter(similarly for other filter types).
• Create an issue on Jira similar to the subscription created but with the same reporter/assignee, you should receive the subscription update on the channel if you had chosen includes in the filter.

Ticket Link

Fixes #891