[New rule suggestion]: Use Split(char, ....) or Split(string, ....) overloads when available

[Youssef1313]

Describe the problem you are trying to solve

Avoid unnecessary array allocations if an array is created only to be passed to string.Split method.

Describe suggestions on how to achieve the rule

1. If one of the string.Split overloads that takes an array is used, and the array contains only one element, and not used anywhere else, the analyzer should suggest using either Split(char, ...) overload or Split(string, ...) overload.

Additional context

Example from dotnet/sdk:

https://github.com/dotnet/sdk/blob/ab2176b3447e3e7820b5a340408110b6d498f907/src/Tasks/Microsoft.NET.Build.Tasks/CompilationOptionsConverter.cs#L20

Using the following will avoid an unnecessary array allocation:

                compilerOptionsItem.GetMetadata("DefineConstants")?.Split(';', StringSplitOptions.RemoveEmptyEntries),

[Dotnet-GitSync-Bot]

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[Youssef1313]

Moved from dotnet/roslyn-analyzers#4122