querystring: refactor to use more primordials

[aduh95]

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

[aduh95]

Benchmark CI didn't show any perf regression or improvement

                                                                                                                                      confidence improvement accuracy (*)    (**)   (***)
querystring/querystring-parse.js n=1000000 type='altspaces'                                                                                          -0.48 %       ±2.32%  ±3.09%  ±4.02%
querystring/querystring-parse.js n=1000000 type='encodefake'                                                                                          0.49 %       ±0.67%  ±0.89%  ±1.16%
querystring/querystring-parse.js n=1000000 type='encodelast'                                                                                          0.09 %       ±0.70%  ±0.93%  ±1.22%
querystring/querystring-parse.js n=1000000 type='encodemany'                                                                                          2.09 %       ±2.39%  ±3.21%  ±4.24%
querystring/querystring-parse.js n=1000000 type='manyblankpairs'                                                                                     -3.94 %       ±4.28%  ±5.76%  ±7.65%
querystring/querystring-parse.js n=1000000 type='manypairs'                                                                                          -2.61 %       ±3.11%  ±4.18%  ±5.53%
querystring/querystring-parse.js n=1000000 type='multicharsep'                                                                                        0.23 %       ±1.76%  ±2.36%  ±3.12%
querystring/querystring-parse.js n=1000000 type='multivalue'                                                                                          0.43 %       ±0.86%  ±1.16%  ±1.51%
querystring/querystring-parse.js n=1000000 type='multivaluemany'                                                                                      0.10 %       ±0.75%  ±1.00%  ±1.30%
querystring/querystring-parse.js n=1000000 type='noencode'                                                                                           -0.03 %       ±0.98%  ±1.31%  ±1.71%
querystring/querystring-stringify.js n=1000000 type='array'                                                                                           2.42 %       ±3.95%  ±5.32%  ±7.04%
querystring/querystring-stringify.js n=1000000 type='encodelast'                                                                                      4.22 %       ±6.96%  ±9.32% ±12.27%
querystring/querystring-stringify.js n=1000000 type='encodemany'                                                                                      1.16 %       ±2.13%  ±2.84%  ±3.72%
querystring/querystring-stringify.js n=1000000 type='multiprimitives'                                                                                 0.72 %       ±2.59%  ±3.47%  ±4.57%
querystring/querystring-stringify.js n=1000000 type='noencode'                                                                                       -1.08 %       ±1.76%  ±2.35%  ±3.06%
querystring/querystring-unescapebuffer.js n=10000000 input='%20%21%22%23%24%25%26%27%28%29%2A%2B%2C%2D%2E%2F%30%31%32%33%34%35%36%37'                 6.40 %      ±13.12% ±17.46% ±22.73%
querystring/querystring-unescapebuffer.js n=10000000 input='there%20are%20several%20spaces%20that%20need%20to%20be%20unescaped'                *    -11.11 %      ±10.44% ±13.90% ±18.10%
querystring/querystring-unescapebuffer.js n=10000000 input='there%2Qare%0-fake%escaped values in%%%%this%9Hstring'                                   -1.54 %      ±12.81% ±17.04% ±22.18%
querystring/querystring-unescapebuffer.js n=10000000 input='there is nothing to unescape here'                                                       -2.51 %      ±12.72% ±16.92% ±22.02%

Be aware that when doing many comparisons the risk of a false-positive
result increases. In this case there are 19 comparisons, you can thus
expect the following amount of false-positive results:
 0.95 false positives, when considering a   5% risk acceptance (*, **, ***),
 0.19 false positives, when considering a   1% risk acceptance (**, ***),
 0.02 false positives, when considering a 0.1% risk acceptance (***)

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/34628/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/34634/ ✅

[Trott]

Landed in a897a25