TEAL: Add columns to assembly error messages.

[jannotti]

This should let IDE integrations or lsp-like programs use the assembly output to direct the cursor the exact spot of many problems. It also allowed some error improvements and simplifications because tokens from the assembly process now know their line number.

The changes in terms of line count are big, but mostly boring. The signatures of the asm* and type* functions changed to take tokens instead of strings, which caused a lot of churn. Also, in order to minimize the work to change existing tests, I converted testProg calls so that they called exp instead of constructing an Expect. That allowed me to make the column checking optional by making the column an optional final argument to exp. I extended a bunch of tests to check columns, but many of the tests were mechanically (emacs kbd macros!) converted to exp, checking only the line number that they always checked.

[codecov]

Codecov Report

Merging #5402 (6cf8549) into master (5e1f8a2) will increase coverage by 0.01%.
The diff coverage is 90.88%.

@@            Coverage Diff             @@
##           master    #5402      +/-   ##
==========================================
+ Coverage   55.44%   55.46%   +0.01%     
==========================================
  Files         452      452              
  Lines       63689    63717      +28     
==========================================
+ Hits        35312    35340      +28     
- Misses      25965    25971       +6     
+ Partials     2412     2406       -6     

Impacted Files	Coverage Δ
data/transactions/logic/assembler.go	92.30% <90.88%> (+1.71%)	⬆️

... and 7 files with indirect coverage changes

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[bbroder-algo]

Neat!