eKuiper 1.7.2 release

What's Changed

• chore: change latest image to alpine image by @Rory-Z in #1485
• Doc fixes by @ngjaying in #1489
• fix(conf): fix config overwritten by environment issue by @superrxan in #1495
• fix(meta): clean up for resource manager for 1.7.x by @ngjaying in #1499
• fix(func): avg/max/min should support int64 inputs for 1.7.x by @ngjaying in #1500
• fix(row): add lock for ToMap to avoid concurrent map write for 1.7.x by @ngjaying in #1501
• fix(meta): remove meta data when plugin deleted by @superrxan in #1502
• fix(rule): obey triggered status when creating rule by @ngjaying in #1505
• feat(meta): metadata/sources add kind parameter by @ngjaying in #1506
• refactor(meta): add data source property for source nodes by @ngjaying in #1510
• fix(meta): update sql source json to add lookup configuration by @ngjaying in #1511

Full Changelog: 1.7.1...1.7.2