use external storage to reduce the memory space usage of some executors

[XuHuaiyu]

Feature Request

Is your feature request related to a problem? Please describe:

As the title says.

Describe the feature you'd like:

issue	difficulty	assignee	PRs
#TODO Use external storage for Index Merge Join	hard	help wanted	N/A
Implement grace hash join when build input is bigger than the available memory #14675 implement grace hash join for Hash Join to avoid OOM of hash table	hard	help wanted	N/A
disk-based partialResultMap for HashAggExec #14413 Use external storage for Hash Aggregation	hard	help wanted	N/A
Disk-based distinct operation #14395 Use external storage for Distinct	hard	help wanted	N/A
Disk-based sort executor #12431 Use external storage for Sort	medium	@wshwsh12	#13718, #14279
#TODO Use external storage for Window Function	medium	help wanted	N/A
#TODO Compare between row-based and vectorized external storage format for different executors	hard	help wanted	N/A

Describe alternatives you've considered:

Teachability, Documentation, Adoption, Migration Strategy:

[Tjianke]

Hello, I'm interested in implementing external storage for window function, is it still needed(As I noticed window function already has sliding window implemented in #14294)?