Eliminate build warnings from the Scrap crate (#13383)

* Updated build.rs to tell RustC that dxgi, quartz and x11 are expected configurations.
Added lifetime annotations to various methods in common/aom.rs and common/vpxcodec.rs.
Updated common/vpx.rs to allow unused_imports in the generated bindings.
Updated dxgi/mag.rs to allow non_snake_case identifiers like "dwFilterMode".

* Added lifetime annotations to methods in common/hwcodec.rs and common/vram.rs.

* Switched syntax for the rustc-check-cfg directive emitted by build.rs in the scrap crate to use syntax compatible with Rust toolchain version 1.75. The double-colon syntax requires 1.77 or newer, but the older single-colon syntax works fine on newer versions for this directive.

* Update libs/scrap/build.rs

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Revert apparently-erroneous AI suggestion. It's usually pretty good, but not always right it seems. :-)

This reverts commit bf862b13f6.

* Removed redundant configuration directives from libs/scrap/build.rs.

---------

Co-authored-by: RustDesk <71636191+rustdesk@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

libs/scrap/src/common/hwcodec.rs

@@ -364,7 +364,7 @@ impl HwRamDecoder {
             }
         }
     }
-    pub fn decode(&mut self, data: &[u8]) -> ResultType<Vec<HwRamDecoderImage>> {
+    pub fn decode<'a>(&'a mut self, data: &[u8]) -> ResultType<Vec<HwRamDecoderImage<'a>>> {
         match self.decoder.decode(data) {
             Ok(v) => Ok(v.iter().map(|f| HwRamDecoderImage { frame: f }).collect()),
             Err(e) => Err(anyhow!(e)),