Reflex installs Bun even though BUN_PATH is set

[n0r1z0]

Describe the bug
Reflex installs Bun even though BUN_PATH is set.

To Reproduce

1. Install Bun manually. However, the version of Bun is different from constants.Bun.VERSION.
2. Set an environment variable BUN_PATH as the installed bun path.
3. Run reflex init.

Expected behavior
The installation of Bun would be skipped.

Additional context
The condition of Bun installation seems incorrect.

Current implementation:

reflex/reflex/utils/prerequisites.py

Lines 795 to 800 in b01c4b6

	# Skip if bun is already installed.
	if os.path.exists(get_config().bun_path) and get_bun_version() == version.parse(
	constants.Bun.VERSION
	):
	console.debug("Skipping bun installation as it is already installed.")
	return

I suppose this should be changed as below:

# Skip if bun is already installed.
bun_path = get_config().bun_path
if bun_path != constants.Bun.DEFAULT_PATH or os.path.exists(bun_path) and get_bun_version() == version.parse(
    constants.Bun.VERSION
):
    console.debug("Skipping bun installation as it is already installed.")
    return

[Lendemor]

PR #4006 is introducing REFLEX_USE_SYSTEM_BUN as an env var.
Let us know if this solve the issue for you.