Merge | TdsParser cosmetic changes

[edwardneal]

This cleans up the diff of TdsParser. Contributes to #2953.

I recommend disabling whitespace when viewing this, it'll bring the PR size down to +239/-148.

Most of TdsParser is pretty similar. We've refactored a few methods, some of the members are in different orders and there are other cosmetic differences though, so this needs to be aligned before we can see where the true differences lie. This PR is the first of a few which do that. I'm fairly sure that once we've done that, only a few dozen lines of code will truly be different.

This dovetails with #2985, which handles some of the refactoring.

If someone from the SqlClient team can run CI, this should be enough to validate it. I don't expect that anything will have changed in the compiled DLL.

[paulmedynski]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[paulmedynski]

Need comment from @benrr101 regarding constrainted regions.

[codecov]

Codecov Report

Attention: Patch coverage is 50.29586% with 84 lines in your changes missing coverage. Please review.

Project coverage is 66.02%. Comparing base (e0fa87b) to head (05d8a51).
Report is 21 commits behind head on main.

Files with missing lines	Patch %	Lines
.../netcore/src/Microsoft/Data/SqlClient/TdsParser.cs	34.37%	63 Missing ⚠️
...nt/netfx/src/Microsoft/Data/SqlClient/TdsParser.cs	71.23%	21 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (e0fa87b) and HEAD (05d8a51). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (e0fa87b)	HEAD (05d8a51)
addons	1	0

Additional details and impacted files

@@ Coverage Diff @@## main #3222 +/- ##
==========================================
- Coverage 72.64% 66.02% -6.63% 
==========================================
Files 288 282 -6 Lines 59600 59331 -269 ==========================================
- Hits 43299 39173 -4126 - Misses 16301 20158 +3857 

Flag	Coverage Δ
addons	?
netcore	68.82% <34.37%> (-6.35%)	⬇️
netfx	65.00% <71.23%> (-6.27%)	⬇️

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