Optimize ruleset building

[atuchin-m]

For brave/brave-browser#50463

The PR improves memory usage and building time:

• deduplicates some strings, that saves memory and building time ;
• optimizes encode_script_with_permission by preallocate the necessary memory.

The results:

• memory 11.5MB => 10.2MB
• building time 183.06 ms => 170.23 ms

[github-actions]

Rust Benchmark

Benchmark suite	Current: 6d3fef0	Previous: 1bf068d	Ratio
rule-match-browserlike/brave-list	2247328681 ns/iter (± 11044224)	2260065342 ns/iter (± 8732867)	0.99
rule-match-first-request/brave-list	1104350 ns/iter (± 5584)	1127532 ns/iter (± 14737)	0.98
blocker_new/brave-list	177390045 ns/iter (± 2969458)	178507782 ns/iter (± 1633867)	0.99
blocker_new/brave-list-deserialize	23340661 ns/iter (± 181967)	23438268 ns/iter (± 45267)	1.00
memory-usage/brave-list-initial	10212240 ns/iter (± 3)	11499344 ns/iter (± 3)	0.89
memory-usage/brave-list-initial/max	67489131 ns/iter (± 3)	67489115 ns/iter (± 3)	1.00
memory-usage/brave-list-initial/alloc-count	1610839 ns/iter (± 3)	1660477 ns/iter (± 3)	0.97
memory-usage/brave-list-1000-requests	2666942 ns/iter (± 3)	2666926 ns/iter (± 3)	1.00
memory-usage/brave-list-1000-requests/alloc-count	71353 ns/iter (± 3)	71337 ns/iter (± 3)	1.00
url_cosmetic_resources/brave-list	202523 ns/iter (± 806)	200630 ns/iter (± 2466)	1.01
cosmetic-class-id-match/brave-list	3553534 ns/iter (± 999457)	3420999 ns/iter (± 962032)	1.04

This comment was automatically generated by workflow using github-action-benchmark.