feat(cli): support multiple env file argument (#26527)

Closes #26425 

## Overview

This PR adds support for specifying multiple environment files as
arguments when using the Deno CLI. Subsequent files override
pre-existing variables defined in previous files.

If the same variable is defined in the environment and in the file, the
value from the environment takes precedence.

## Example Usage
```bash
deno run --allow-env --env-file --env-file=".env.one" --env-file=".env.two" script.ts
```

---------

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>

1 files changed, 0 insertions, 10 deletions

diff --git a/tests/integration/run_tests.rs b/tests/integration/run_tests.rs
index 549b88bac..c97b700c5 100644
--- a/tests/integration/run_tests.rs
+++ b/tests/integration/run_tests.rs
@@ -418,16 +418,6 @@ fn permissions_cache() {
     });
 }
 
-itest!(env_file {
-  args: "run --env=env --allow-env run/env_file.ts",
-  output: "run/env_file.out",
-});
-
-itest!(env_file_missing {
-  args: "run --env=missing --allow-env run/env_file.ts",
-  output: "run/env_file_missing.out",
-});
-
 itest!(lock_write_fetch {
   args:
     "run --quiet --allow-import --allow-read --allow-write --allow-env --allow-run run/lock_write_fetch/main.ts",