Use IndexOfAnyValues in Uri.EscapeString helper

[MihaZupan]

Contributes to #78204 now that we have #78722

Method	Toolchain	Input	Mean	Error	Ratio
EscapeDataString	main	AsciiNeedsEscaping	8,271.13 ns	51.813 ns	1.00
EscapeDataString	pr	AsciiNeedsEscaping	5,560.41 ns	10.109 ns	0.67
EscapeDataString	main	NothingToEscape	592.44 ns	3.579 ns	1.00
EscapeDataString	pr	NothingToEscape	67.00 ns	0.557 ns	0.11
EscapeDataString	main	Unicode	13,090.05 ns	102.756 ns	1.00
EscapeDataString	pr	Unicode	9,780.85 ns	19.247 ns	0.75

Things like NothingToEscape will of course improve even further with AVX2 support in IndexOfAnyAsciiSearcher#78863.

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Issue Details

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Contributes to #78204 now that we have #78722

Method	Toolchain	Input	Mean	Error	Ratio
EscapeDataString	main	AsciiNeedsEscaping	8,271.13 ns	51.813 ns	1.00
EscapeDataString	pr	AsciiNeedsEscaping	5,560.41 ns	10.109 ns	0.67
EscapeDataString	main	NothingToEscape	592.44 ns	3.579 ns	1.00
EscapeDataString	pr	NothingToEscape	67.00 ns	0.557 ns	0.11
EscapeDataString	main	Unicode	13,090.05 ns	102.756 ns	1.00
EscapeDataString	pr	Unicode	9,780.85 ns	19.247 ns	0.75

Things like NothingToEscape will of course improve even further with AVX2 support in IndexOfAnyAsciiSearcher#78863.

Author:	MihaZupan
Assignees:	-
Labels:	area-System.Net
Milestone:	8.0.0