decomp3: decompile remaining mission code (#3515)

This should make all missions playable with the exception of the end of
`precursor-destroy-ship` because `precurd` asserts on level extraction.

- `trail`
- `trail-graph`
- `wastrail-graph`
- `cty-protect`
- `protect-gunship`
- `protect-path`
- `protect-script`
- `assault-cams`
- `assault-enemies`
- `assault-path`
- `assault-script`
- `assault-shared`
- `assault-task`
- `hover-nav-precura`
- `precura-mood`
- `precura-obs`
- `precura-obs2`
- `precura-part`
- `precurc-mood`
- `precurc-obs`
- `precurc-part`
- `precurd-obs`
- `precurd-part`
- `precurd-scenes`

decompiler/level_extractor/extract_level.cpp

@@ -201,7 +201,7 @@ level_tools::BspHeader extract_bsp_from_level(const ObjectFileDB& db,
         expected_missing_textures = it->second;
       }
       bool atest_disable_flag = false;
-      if (db.version() == GameVersion::Jak2) {
+      if (db.version() >= GameVersion::Jak2) {
         if (bsp_header.texture_flags[0] & 1) {
           atest_disable_flag = true;
         }