chore: Remove IsDeleted from action (activity) table (#9829)

Fixes [#3525](https://codeberg.org/forgejo/forgejo/issues/3525) and supersedes [#9586](https://codeberg.org/forgejo/forgejo/pulls/9586)

## Checklist

The [contributor guide](https://forgejo.org/docs/next/contributor/) contains information that will be helpful to first time contributors. There also are a few [conditions for merging Pull Requests in Forgejo repositories](https://codeberg.org/forgejo/governance/src/branch/main/PullRequestsAgreement.md). You are also welcome to join the [Forgejo development chatroom](https://matrix.to/#/#forgejo-development:matrix.org).

### Tests

- I added test coverage for Go changes...
  - [ ] in their respective `*_test.go` for unit tests.
  - [ ] in the `tests/integration` directory if it involves interactions with a live Forgejo server.
- I added test coverage for JavaScript changes...
  - [ ] in `web_src/js/*.test.js` if it can be unit tested.
  - [ ] in `tests/e2e/*.test.e2e.js` if it requires interactions with a live Forgejo server (see also the [developer guide for JavaScript testing](https://codeberg.org/forgejo/forgejo/src/branch/forgejo/tests/e2e/README.md#end-to-end-tests)).

### Documentation

- [ ] I created a pull request [to the documentation](https://codeberg.org/forgejo/docs) to explain to Forgejo users how to use this change.
- [ ] I did not document these changes and I do not expect someone else to do it.

### Release notes

- [ ] I do not want this change to show in the release notes.
- [x] I want the title to show in the release notes with a link to this pull request.
- [ ] I want the content of the `release-notes/<pull request number>.md` to be be used for the release notes instead of the title.

<!--start release-notes-assistant-->

## Release notes
<!--URL:https://codeberg.org/forgejo/forgejo-->
- Features
  - [PR](https://codeberg.org/forgejo/forgejo/pulls/9829): <!--number 9829 --><!--line 0 --><!--description Y2hvcmU6IFJlbW92ZSBJc0RlbGV0ZWQgZnJvbSBhY3Rpb24gKGFjdGl2aXR5KSB0YWJsZQ==-->chore: Remove IsDeleted from action (activity) table<!--description-->
<!--end release-notes-assistant-->

Co-authored-by: Mathieu Fenniak <mathieu@fenniak.net>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/9829
Reviewed-by: Mathieu Fenniak <mfenniak@noreply.codeberg.org>
Co-authored-by: Leni Kadali <lenikadali@noreply.codeberg.org>
Co-committed-by: Leni Kadali <lenikadali@noreply.codeberg.org>

routers/web/feed/profile.go

@@ -33,7 +33,6 @@ func showUserFeed(ctx *context.Context, formatType string) {
 		Actor:           ctx.Doer,
 		IncludePrivate:  includePrivate,
 		OnlyPerformedBy: !ctx.ContextUser.IsOrganization(),
-		IncludeDeleted:  false,
 		Date:            ctx.FormString("date"),
 	})
 	if err != nil {

routers/web/user/home.go

@@ -119,7 +119,6 @@ func Dashboard(ctx *context.Context) {
 		Actor:           ctx.Doer,
 		IncludePrivate:  true,
 		OnlyPerformedBy: false,
-		IncludeDeleted:  false,
 		Date:            ctx.FormString("date"),
 		ListOptions: db.ListOptions{
 			Page:     page,

routers/web/user/profile.go

@@ -195,7 +195,6 @@ func prepareUserProfileTabData(ctx *context.Context, showPrivate bool, profileDb
 			Actor:           ctx.Doer,
 			IncludePrivate:  showPrivate,
 			OnlyPerformedBy: true,
-			IncludeDeleted:  false,
 			Date:            date,
 			ListOptions: db.ListOptions{
 				PageSize: pagingNum,