Fuzzmanager

- Add line_no field to backtrace parsing exceptions
- Drop Python 3.7
- Fix grcov output parsing on Windows

Add parsing for sanitizer heap_profile traces.

Fix trace parsing for Clang 14

* Drop support for Python 3.6
* [FTB] Fix Apple and CDB CrashInfo parsing

* Last release supporting Python 3.6!
* [crashmanager] Fix view signature error handling
* [crashmanager] Remove pagination from the Bucket list API entirely
* [crashmanager] Optimize bucket tool filter
* [crashmanager] Use local sort for signatures list.
* [crashmanager] Remove management command lock and speed up triage.
* [crashmanager] Optimize bucket list query.
* [covmanager] Fix empty prefix display.
* [server] Update base template.
* [taskmanager] Fix creation of non-Linux "extra" pools.
* [crashmanager] Fix quality and optimization sorting in signatures list
* [crashmanager] Handle the case where testcase_ext is given with no testcase.