RFR: 8284780: Need methods to create pre-sized HashSet and LinkedHashSet [v15]

[XenoAmess]

> as title.

XenoAmess has updated the pull request incrementally with six additional commits since the last revision:

 - Update src/java.base/share/classes/java/util/LinkedHashSet.java
   
   Co-authored-by: liach <7806504+liach at users.noreply.github.com>
 - Update src/java.base/share/classes/java/util/LinkedHashSet.java
   
   Co-authored-by: liach <7806504+liach at users.noreply.github.com>
 - Update src/java.base/share/classes/java/util/LinkedHashSet.java
   
   Co-authored-by: liach <7806504+liach at users.noreply.github.com>
 - Update src/java.base/share/classes/java/util/HashSet.java
   
   Co-authored-by: liach <7806504+liach at users.noreply.github.com>
 - Update src/java.base/share/classes/java/util/HashSet.java
   
   Co-authored-by: liach <7806504+liach at users.noreply.github.com>
 - Update src/java.base/share/classes/java/util/HashSet.java
   
   Co-authored-by: liach <7806504+liach at users.noreply.github.com>

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8302/files
  - new: https://git.openjdk.java.net/jdk/pull/8302/files/117918f4..42fba932

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8302&range=14
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8302&range=13-14

  Stats: 6 lines in 2 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8302.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8302/head:pull/8302

PR: https://git.openjdk.java.net/jdk/pull/8302