embedded-services: Fix cortex-m dependencies

[kurtjd]

Removes the cortex-m-rt dependency entirely since this is not needed and risks pulling in conflicting linker scripts depending on where they are in relation to each other in the search graph when embedded-services is used on a different architecture. Then also made cortex-m only included if the architecture is arm to be extra-safe.

Fixes a minor issue I was running into trying to work on a risc-v platform.

[Copilot]

Pull request overview

Adjusts embedded-services’ ARM-specific dependency wiring so using the crate on non-ARM (e.g., RISC-V) no_std targets doesn’t accidentally pull in Cortex-M runtime/linker-script baggage.

Changes:

• Remove cortex-m-rt from the embedded-services dependency graph.
• Gate the cortex-m dependency to cfg(all(target_os = "none", target_arch = "arm")) to avoid non-ARM no_std builds pulling it in.
• Regenerate affected lockfiles (workspace + examples) to reflect the dependency changes.

Reviewed changes

Copilot reviewed 1 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
examples/std/Cargo.lock	Drops cortex-m-rt entries pulled in via embedded-services.
examples/rt685s-evk/Cargo.lock	Removes cortex-m-rt from embedded-services dependency list in the lock.
examples/rt633/Cargo.lock	Removes cortex-m-rt from embedded-services dependency list in the lock.
examples/pico-de-gallo/Cargo.lock	Drops cortex-m-rt entries pulled in via embedded-services.
embedded-service/Cargo.toml	Removes cortex-m-rt and gates cortex-m to ARM no_std targets only.
Cargo.lock	Updates workspace lock to remove cortex-m-rt from embedded-services deps.