vim-patch:9.0.0049: csv and tsv files are not recognized (#19300)

Problem:    Csv and tsv files are not recognized.
Solution:   Add patterns fo csv and tsv files. (Leandro Lourenci,
            closes vim/vim#10680)
99af91e582

src/nvim/testdir/test_filetype.vim

@@ -128,6 +128,7 @@ let s:filename_checks = {
     \ 'csp': ['file.csp', 'file.fdr'],
     \ 'css': ['file.css'],
     \ 'cterm': ['file.con'],
+    \ 'csv': ['file.csv'],
     \ 'cucumber': ['file.feature'],
     \ 'cuda': ['file.cu', 'file.cuh'],
     \ 'cupl': ['file.pld'],
@@ -563,6 +564,7 @@ let s:filename_checks = {
     \ 'tsscl': ['file.tsscl'],
     \ 'tssgm': ['file.tssgm'],
     \ 'tssop': ['file.tssop'],
+    \ 'tsv': ['file.tsv'],
     \ 'twig': ['file.twig'],
     \ 'typescript.glimmer': ['file.gts'],
     \ 'typescriptreact': ['file.tsx'],