Partially addresses #47424.

This ensures that we have more visibility in the number of SQL queries
that are executed in web requests. The current threshold is hardcoded to
100 as we will rarely (maybe once or twice) change it.

In production and development we use Sentry if enabled, in the test
environment we raise an error. This feature is also only enabled in
production/staging when running on GitLab.com as it's not very useful to
other users.

Password can now be specified at the same time as the new URL, and the service
template admin pages now work.

This reverts commit b4639754.

It now allows to specify a password at the same time as the new URL, and works
on the service template admin pages.

Consolidate allowed parameters in one place to avoid these kinds of bugs in the future.

Closes https://github.com/gitlabhq/gitlabhq/issues/9181

Signed-off-by: Jeroen van Baarsen <jeroenvanbaarsen@gmail.com>

Closes #1275

See #1950

See #1809.