Improve slow Task queries

[Porges]

Querying Tasks only by TaskID is slow as it requires querying many partitions. Querying Task by JobID and TaskID is fast as it is a point lookup.

1. rename existing GetTaskById to GetTaskByIdSlow
2. include JobID in event data from agent (new properties are optional for back-compat)
3. include JobID in NodeTask entity (if this is missing upon lookup we will fall back to GetTaskByIdSlow)

[codecov-commenter]

Codecov Report

Merging #3594 (71cb0c3) into main (ca3c503) will increase coverage by 0.01%. The diff coverage is 44.64%.

@@            Coverage Diff             @@
##             main    #3594      +/-   ##
==========================================
+ Coverage   39.96%   39.97%   +0.01%     
==========================================
  Files         303      303              
  Lines       37635    37698      +63     
  Branches     1721     1725       +4     
==========================================
+ Hits        15040    15070      +30     
- Misses      22276    22307      +31     
- Partials      319      321       +2     

Files	Coverage Δ
src/ApiService/ApiService/OneFuzzTypes/Model.cs	69.06% <100.00%> (+0.03%)	:arrow_up:
src/agent/onefuzz-agent/src/agent.rs	58.05% <100.00%> (+1.66%)	:arrow_up:
src/agent/onefuzz-agent/src/agent/tests.rs	100.00% <100.00%> (ø)
src/agent/onefuzz-agent/src/work.rs	16.66% <ø> (-1.86%)	:arrow_down:
src/agent/onefuzz-agent/src/worker.rs	48.25% <100.00%> (+0.27%)	:arrow_up:
src/agent/onefuzz-agent/src/worker/tests.rs	99.39% <100.00%> (+<0.01%)	:arrow_up:
.../ApiService/ApiService/Functions/QueueJobResult.cs	0.00% <0.00%> (ø)
.../ApiService/ApiService/Functions/TimerRetention.cs	0.00% <0.00%> (ø)
src/ApiService/ApiService/OneFuzzTypes/Requests.cs	59.62% <87.50%> (+0.70%)	:arrow_up:
...ApiService/ApiService/onefuzzlib/TaskOperations.cs	28.40% <50.00%> (+0.16%)	:arrow_up:
... and 9 more

[Porges]

Passed check-pr.