project-lakitu: update kubernetes to v1.21.3

BUG=b/186855573
TEST=presubmit and manual
k8s-e2e-test(https://screenshot.googleplex.com/ABVyL6RtWUeWiKe)
RELEASE_NOTE=Updated the built-in kubectl/kubelet to 1.21.3

Change-Id: I7cc122ca911f87089f15e930b144bb18d99c1da4
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/20251
Reviewed-by: Dexter Rivera <riverade@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
diff --git a/project-lakitu/app-emulation/kubernetes/Manifest b/project-lakitu/app-emulation/kubernetes/Manifest
index c484f38..f0cb4de 100644
--- a/project-lakitu/app-emulation/kubernetes/Manifest
+++ b/project-lakitu/app-emulation/kubernetes/Manifest
@@ -1,3 +1,3 @@
 DIST kubernetes-server-linux-amd64-1.19.2.tar.gz 309654876 BLAKE2B e6dcc31ff098e7f82cb87c6cce430bc21379edcc4b845d35be31dbc91899e6591db052caf2a61c6c2c5a5f23b7e15b220868646b1878f813ad07c2313c697799 SHA512 a62092bd3eaeb1f63e73478eb5436ba094d6822bfcc7e8eabb6ead9411da7ca5032f00a7328914461f29b5b184b12456e025e85e3a2b12f6137596d78b6febe7
-DIST kubernetes-server-linux-amd64-1.20.5.tar.gz 317090003 BLAKE2B dd4d43c1388aff7ed3de9a60a0718ce1e5d4294519121c0da7422ca5e45ef8f66858c7aa281bddb1b59ff10b348e8d3764c6ee72d29404c5f06616f3685f9815 SHA512 28529733bf34f5d5b72eabe30a81df98cc7f8e529590f807745cd67986a2c5c3eb86cebc7ecbcfc3df3c50416306e5d150948f2483933ea46c2aebaeb871ea8f
-DIST kubernetes-server-linux-arm64-1.20.5.tar.gz 292604681 BLAKE2B 111c3b9fd319f11ce0d1e8b6965333b67a69abdb3c3feb01aafdeb5a3b3603df03eeb30858da5541b3f09cedd2c106972096b295468944e9ac4552cca2171757 SHA512 4118246f839fab24d898f51df9c2c7703ad165c074d9068305f61647afa73e2c7803feaea3afce4b8db96ec7d49c9a3815b37e5d18cebb82d47cabbeba226219
+DIST kubernetes-server-linux-amd64-1.21.3.tar.gz 325747202 BLAKE2B f4a7c85c7b44f02523638ebe3f5cca1aea070d2cba5353cc56fc32053a5b5242e722b72b2d150d8cc961849732a95761ebad15fcaabdd65e437cc85d9c849e3e SHA512 a516adcd06fcb0ace9a1cfb1519f57f4e4ca59183043a5245354403a6c42c0bbfe968cc02741d7b6f2287fc838ccd7bfa0bf19e951ea3653096dbc6ac265223c
+DIST kubernetes-server-linux-arm64-1.21.3.tar.gz 296649870 BLAKE2B 3b70c8b4f221ab0f4a9db58dd5ea6ad8dea4b02ca29a9cbd0aee753976d08cb137dff1a844f35833dc1b9063de0a5182eb8c9a80147c236605c4aefd1d3fe637 SHA512 57cd457ef8bcf90e5205e8dc63ab989ec5f669f56dce30dd9ebb1f4ccbad9001bf8f56b85311400f0bc7a3c9fdf10637ec8570bce5d7795f518a7fa88b9e52e9
diff --git a/project-lakitu/app-emulation/kubernetes/kubernetes-1.20.5-r2.ebuild b/project-lakitu/app-emulation/kubernetes/kubernetes-1.20.5-r2.ebuild
deleted file mode 120000
index 2d8fb71..0000000
--- a/project-lakitu/app-emulation/kubernetes/kubernetes-1.20.5-r2.ebuild
+++ /dev/null
@@ -1 +0,0 @@
-kubernetes-1.20.5.ebuild
\ No newline at end of file
diff --git a/project-lakitu/app-emulation/kubernetes/kubernetes-1.21.3-r1.ebuild b/project-lakitu/app-emulation/kubernetes/kubernetes-1.21.3-r1.ebuild
new file mode 120000
index 0000000..fd91662
--- /dev/null
+++ b/project-lakitu/app-emulation/kubernetes/kubernetes-1.21.3-r1.ebuild
@@ -0,0 +1 @@
+kubernetes-1.21.3.ebuild
\ No newline at end of file
diff --git a/project-lakitu/app-emulation/kubernetes/kubernetes-1.20.5.ebuild b/project-lakitu/app-emulation/kubernetes/kubernetes-1.21.3.ebuild
similarity index 100%
rename from project-lakitu/app-emulation/kubernetes/kubernetes-1.20.5.ebuild
rename to project-lakitu/app-emulation/kubernetes/kubernetes-1.21.3.ebuild