Parser error on lambda corner case

### Tested versions

- Reproducible in `master` latest (0a4aedb36065f66fc7e99cb2e6de3e55242f9dfb)

### System information

Ubuntu 24

### Issue description

The following script:
```gdscript
extends Node

func foo():
pass

func _ready() -> void:
get_tree().create_timer(1.0).timeout.connect(foo) # works
get_tree().create_timer(1.0).timeout.connect(func(): foo()) # works
get_tree().create_timer(1.0).timeout.connect(
func():
foo()
) # works
(
get_tree()
. create_timer(1.0)
. timeout
. connect(foo)
) # works
(
get_tree()
. create_timer(1.0)
. timeout
. connect(func(): foo())
) # works
(
get_tree()
. create_timer(1.0)
. timeout
. connect(
func(): foo()
)
) # works
(
get_tree()
. create_timer(1.0)
. timeout
. connect(
func():
foo())
) # works !
(
get_tree()
. create_timer(1.0)
. timeout
. connect(
func():
foo()
)
) # doesn't work !
```

yields
```
SCRIPT ERROR: Parse Error: Unindent doesn't match the previous indentation level.
at: GDScript::reload (res://tests/potential-godot-bugs/lambda_corner_case.gd:47)
ERROR: Failed to load script "res://tests/potential-godot-bugs/lambda_corner_case.gd" with error "Parse error".
at: load (modules/gdscript/gdscript.cpp:3005)
```

while IMO it should parse correctly.

### Steps to reproduce

Run the above using `godot --headless --check-only -s `

### Minimal reproduction project (MRP)

See above.

Start by reproducing the final multiline-lambda case with `godot --headless --check-only -s ` and inspect the GDScript path reported at `modules/gdscript/gdscript.cpp:3005`. Trace how the parser handles the closing parenthesis and indentation after the lambda body. Done means the provided script parses without the unindent error and the corner case has regression coverage.

Written by the indexing model from the issue text.