[STAL-2831] Add YAML + configuration method

[juli1]

What problems are you trying to solve?

1. Default YAML rules are not being pulled
2. We do not show how the analyzer is configured when using remote configuration.

What is your solution?

1. Add a ConfigMethod that indicates how the analyzer is configured (file, remote or nothing)
2. Add YAML in the list of default languages

Testing

With no remote config or file

Configuration
=============
version                : 0.4.2
revision               : development
config method          : none (no local file and no remote configuration)
cores available        : 10
cores used             : 8
#static analysis rules : 880
source directory       : /Users/julien.delange/git/tree-sitter-xml
subdirectories         :
output file            : /Users/julien.delange/test.sarif
secrets enabled        : false
output format          : sarif
ignore paths           : Cargo.lock,target/,build/,prebuilds/,node_modules/,.build/,Package.resolved,go.sum,_obj/,.venv/,dist/,*.egg-info,*.whl,*.a,*.so,*.so.*,*.dylib,*.dll,*.pc,/examples/*/,dsl.d.ts,*.wasm,*.obj,*.o,**/node_modules/**/*,**/jspm_packages/**/*,**/.next/**/*,**/.vuepress/**/*,**/venv/**/*,**/__pycache__/**/*,**/_vendor/bundle/ruby/**/*,**/.vendor/bundle/ruby/**/*,**/.bundle/**/*,**/.gradle/**/*
only paths             : all paths
ignore gitignore       : false
use debug              : false
use staging            : true
ignore gen files       : true
rules languages        : ruby,python,dockerfile,go,yaml,c#,php,javascript,java,typescript
max file size          : 200 kb

With remote config

Configuration
=============
version                : 0.4.2
revision               : development
config method          : remote configuration
cores available        : 10
cores used             : 8
#static analysis rules : 98
source directory       : /Users/julien.delange/git/datadog-static-analyzer
subdirectories         :
output file            : /Users/julien.delange/test.sarif
secrets enabled        : false
output format          : sarif
ignore paths           : debug/,target/,Cargo.lock,**/*.rs.bk,*.pdb,*~,crates/static-analysis-kernel/.vendor/,.idea,venv,**/node_modules/**/*,**/jspm_packages/**/*,**/.next/**/*,**/.vuepress/**/*,**/venv/**/*,**/__pycache__/**/*,**/_vendor/bundle/ruby/**/*,**/.vendor/bundle/ruby/**/*,**/.bundle/**/*,**/.gradle/**/*
only paths             : all paths
ignore gitignore       : false
use debug              : false
use staging            : true
ignore gen files       : true
rules languages        : go,python
max file size          : 200 kb
Analyzing 2 Python files using 59 rules

With local config

Configuration
=============
version                : 0.4.2
revision               : development
config method          : local config file (static-analysis.datadog.[yml|yaml])
cores available        : 10
cores used             : 8
#static analysis rules : 59
source directory       : /Users/julien.delange/git/tree-sitter-xml
subdirectories         :
output file            : /Users/julien.delange/test.sarif
secrets enabled        : false
output format          : sarif
ignore paths           : Cargo.lock,target/,build/,prebuilds/,node_modules/,.build/,Package.resolved,go.sum,_obj/,.venv/,dist/,*.egg-info,*.whl,*.a,*.so,*.so.*,*.dylib,*.dll,*.pc,/examples/*/,dsl.d.ts,*.wasm,*.obj,*.o,**/node_modules/**/*,**/jspm_packages/**/*,**/.next/**/*,**/.vuepress/**/*,**/venv/**/*,**/__pycache__/**/*,**/_vendor/bundle/ruby/**/*,**/.vendor/bundle/ruby/**/*,**/.bundle/**/*,**/.gradle/**/*
only paths             : all paths
ignore gitignore       : false
use debug              : false
use staging            : true
ignore gen files       : true
rules languages        : python
max file size          : 200 kb