[chore] Fix codecov script (#24421)

## Description 

This PR fixes the nightly code coverage issue; the `config-patch` got
broken due to the addition of a `target` section in the
`~/.cargo/config.toml`.

## Test plan 

Code coverage workflow should run successfully. It was manually
triggered to check the fix.

---

## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

For each box you select, include information after the relevant heading
that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] gRPC:
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:
- [ ] Indexing Framework:

Author: stefan-mysten

.cargo/config.toml

@@ -28,8 +28,9 @@ move-clippy = [
     "-Aclippy::needless_borrows_for_generic_args",
 ]
 
+[build]
+rustflags = ["-C", "force-frame-pointers=yes", "-C", "force-unwind-tables=yes", "-A", "unknown_lints", "-A", "mismatched_lifetime_syntaxes"]
+
 [target.x86_64-pc-windows-msvc]
 rustflags = ["-C", "link-args=/STACK:8388608"] # increase stack size to 8MB for Windows to avoid stack overflow in main thread
 
-[build]
-rustflags = ["-C", "force-frame-pointers=yes", "-C", "force-unwind-tables=yes", "-A", "unknown_lints", "-A", "mismatched_lifetime_syntaxes"]

scripts/simtest/config-patch

@@ -2,12 +2,15 @@ diff --git a/.cargo/config.toml b/.cargo/config.toml
 index e813938e5b..6eb22f38d1 100644
 --- a/.cargo/config.toml
 +++ b/.cargo/config.toml
-@@ -29,4 +29,4 @@ move-clippy = [
+@@ -29,7 +29,7 @@
  ]
 
  [build]
 -rustflags = ["-C", "force-frame-pointers=yes", "-C", "force-unwind-tables=yes", "-A", "unknown_lints", "-A", "mismatched_lifetime_syntaxes"]
 +rustflags = ["-C", "force-frame-pointers=yes", "-C", "force-unwind-tables=yes", "-A", "unknown_lints", "-A", "mismatched_lifetime_syntaxes", "--cfg", "msim"]
+
+ [target.x86_64-pc-windows-msvc]
+ rustflags = ["-C", "link-args=/STACK:8388608"] # increase stack size to 8MB for Windows to avoid stack overflow in main thread
 diff --git a/Cargo.toml b/Cargo.toml
 index 2322475d08..0e9ccd0479 100644
 --- a/Cargo.toml