Setting TERRAGRUNT_USE_PARTIAL_PARSE_CONFIG_CACHE does not activate flag use-partial-parse-config-cache

[RafaelWO]

Describe the bug

Setting the environment variable TERRAGRUNT_USE_PARTIAL_PARSE_CONFIG_CACHE=true does not activate the feature flag use-partial-parse-config-cache. Although the documentation lists it as the deprecated alias of TG_USE_PARTIAL_PARSE_CONFIG_CACHE.

Steps To Reproduce

1. mkdir temp && cd temp
2. touch terragrunt.hcl
3. terragrunt --version

terragrunt version v0.83.2

4. TERRAGRUNT_USE_PARTIAL_PARSE_CONFIG_CACHE=true terragrunt init --log-level debug

13:44:03.785 DEBUG  Terragrunt Version: 0.83.2
13:44:03.785 DEBUG  Skipping stack generation in .
13:44:03.785 DEBUG  Did not find any locals block: skipping evaluation.
...

Expected behavior

If the flag is enabled, the logs should contain the statement (partial parsing)

4. TG_USE_PARTIAL_PARSE_CONFIG_CACHE=true terragrunt init --log-level debug

13:44:03.785 DEBUG  Terragrunt Version: 0.83.2
13:44:03.785 DEBUG  Skipping stack generation in .
13:43:30.681 DEBUG  Cache miss for './terragrunt.hcl' (partial parsing), decodeList: '[6 8]'.   <--------
13:44:03.785 DEBUG  Did not find any locals block: skipping evaluation.
...

Nice to haves

• Terminal output
• Screenshots

Versions

• Terragrunt version: v0.83.2
• OpenTofu/Terraform version: Terraform v1.9.8
• Environment details (Ubuntu 20.04, Windows 10, etc.): Ubuntu 24.04.2 LTS

Additional context

Would it be possible for Terragrunt to print all flags and their value in debug mode?