optimize(generic): support priority routing for HTTP generic call

[Marina-Sakai]

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• This PR title match the format: <type>(optional scope): <description>
• The description of this PR title is user-oriented and clear enough for others to understand.

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en:
Kitex's URL routing does not align with hertz's one.
For example, if the routes are like this:

routes := []testRoute{
                {"/cmd/:tool", false},
                {"/cmd/:tool/:sub", false},
                {"/cmd/:tool/abc/:sub", false},
                {"/cmd/vet", false},
                {"/cmd/*filepath", false},
}

[The tree result in hertz]

/cmd/ - vet
          - : (tool) - / - abc - / - : (sub)
                         - : (sub)
          - * (filepath)

[The tree result in kitex]
/cmd/ - :tool
While hertz routes everything, kitex panics as the routes would conflict, except for the first route.
This MR aligns the kitex's routing way with the hertz's.
zh(optional):

Which issue(s) this PR fixes:

[codecov]

Codecov Report

Base: 69.66% // Head: 69.75% // Increases project coverage by +0.08% 🎉

Coverage data is based on head (ee9de37) compared to base (75b446d).
Patch coverage: 97.35% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #739      +/-   ##
===========================================
+ Coverage    69.66%   69.75%   +0.08%     
===========================================
  Files          232      232              
  Lines        17318    17359      +41     
===========================================
+ Hits         12064    12108      +44     
+ Misses        4159     4156       -3     
  Partials      1095     1095              

Impacted Files	Coverage Δ
pkg/generic/descriptor/tree.go	97.37% <97.23%> (-2.63%)	⬇️
pkg/generic/descriptor/router.go	75.00% <100.00%> (ø)
pkg/generic/thrift/parse.go	70.31% <100.00%> (+0.44%)	⬆️
pkg/remote/trans/nphttp2/grpc/controlbuf.go	81.23% <0.00%> (-1.11%)	⬇️
pkg/remote/trans/nphttp2/grpc/http2_client.go	73.59% <0.00%> (+0.15%)	⬆️
pkg/remote/trans/nphttp2/grpc/http2_server.go	71.22% <0.00%> (+0.31%)	⬆️
pkg/remote/trans/nphttp2/conn_pool.go	79.79% <0.00%> (+2.02%)	⬆️
...emote/trans/nphttp2/grpc/grpcframe/frame_reader.go	48.46% <0.00%> (+2.45%)	⬆️
pkg/remote/codec/default_codec.go	75.65% <0.00%> (+3.94%)	⬆️

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