Consolidation of issues in Sans that is applicable to Serif

[NightFurySL2001]

Just to keep track whatever issues that are raised in Sans that affect Serif since the list is growing.

• https://github.com/adobe-fonts/source-han-sans/issues/460
• https://github.com/adobe-fonts/source-han-sans/issues/456
• https://github.com/adobe-fonts/source-han-sans/issues/450
• https://github.com/adobe-fonts/source-han-sans/issues/419
• https://github.com/adobe-fonts/source-han-sans/issues/364
• https://github.com/adobe-fonts/source-han-sans/issues/358
• https://github.com/adobe-fonts/source-han-sans/issues/357
• https://github.com/adobe-fonts/source-han-sans/issues/439
• https://github.com/adobe-fonts/source-han-sans/issues/467

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Included in #156

• https://github.com/adobe-fonts/source-han-sans/issues/398
• https://github.com/adobe-fonts/source-han-sans/issues/300
• https://github.com/adobe-fonts/source-han-sans/issues/315

[NightFurySL2001]

• https://github.com/adobe-fonts/source-han-sans/issues/486

[NightFurySL2001]

Noted from https://github.com/adobe-fonts/source-han-sans/issues/313#issuecomment-2120319422 that 煟 (mentioned in https://github.com/adobe-fonts/source-han-serif/issues/154) and 簝 (related to https://github.com/adobe-fonts/source-han-sans/issues/398) are both in 通用规范汉字表 but are showing the wrong form for CN.

[NightFurySL2001]

• https://github.com/adobe-fonts/source-han-sans/issues/497