fix: respect pageSize and pageToken from gaxOptions

[AVaksman]

• Ensure the tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

Changes

• Expose pageSize and pageToken in getTablesOptions
• Respect pageSize and pageToken passed from gaxOptions
• Values passed in options take precedence vs values from gaxOptions

[codecov]

Codecov Report

Merging #781 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #781   +/-   ##
=======================================
  Coverage   99.14%   99.14%           
=======================================
  Files          17       17           
  Lines       15886    15944   +58     
  Branches      892      965   +73     
=======================================
+ Hits        15750    15808   +58     
  Misses        133      133           
  Partials        3        3           

Impacted Files	Coverage Δ
src/instance.ts	100.00% <100.00%> (ø)
src/table.ts	99.63% <100.00%> (+<0.01%)	⬆️

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[bcoe]

I would lean towards calling this a fix:.

Even though this is technically a breaking change, I think given the prior behavior was obviously a bug, I'm comfortable landing as patch.

Would be curious if any other folks have thoughts though.

[AVaksman]

It shouldn't break an existing code, I believe.

[bcoe]

@AVaksman thank you 👌