chore(proguard): Deprecate --android-manifest argument (#2891)

### Description
The `sentry-cli upload-proguard` command's `--android-manifest` argument
is a no-op; therefore, we are deprecating it.

### Issues
- Resolves #2875 
- Resolves
[CLI-201](https://linear.app/getsentry/issue/CLI-201/deprecate-upload-proguards-android-manifest-argument)

Author: szokeasaurusrex

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Deprecations
 
 - Deprecated the `upload-proguard` subcommand's `--platform` flag ([#2863](https://github.com/getsentry/sentry-cli/pull/2863)). This flag appears to have been a no-op for some time, so we will remove it in the next major.
+- Deprecated the `upload-proguard` subcommand's `--android-manifest` flag ([#2891](https://github.com/getsentry/sentry-cli/pull/2891)). This flag appears to have been a no-op for some time, so we will remove it in the next major.
 
 ## 2.57.0
 

src/commands/upload_proguard.rs

@@ -111,7 +111,10 @@ pub fn make_command(command: Command) -> Command {
                 .value_name("PATH")
                 .conflicts_with("app_id")
                 .hide(true)
-                .help("Read version and version code from an Android manifest file."),
+                .help(
+                    "[DEPRECATED] This flag is a no-op, scheduled \
+                    for removal in Sentry CLI 3.0.0.",
+                ),
         )
         .arg(
             Arg::new("write_properties")
@@ -154,6 +157,14 @@ pub fn execute(matches: &ArgMatches) -> Result<()> {
         );
     }
 
+    if matches.get_one::<String>("android_manifest").is_some() {
+        log::warn!(
+            "[DEPRECATION NOTICE] The --android-manifest argument is deprecated, \
+            and is scheduled for removal in Sentry CLI 3.0.0. \
+            The argument is a no-op."
+        );
+    }
+
     let paths: Vec<_> = match matches.get_many::<String>("paths") {
         Some(paths) => paths.collect(),
         None => {