all: gitattributes: ignore eol=lf to png and testdata

[zchee]

all: gitattributes: ignore eol=lf to png and testdata.

Currently, have diffs even if clean fetching this repository.

$ git clone https://github.com/google/go-cloud gocloud.dev
$ cd gocloud.dev
$ git status
On branch master
Your branch is up to date with 'origin/master'.

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	modified:   internal/docs/img/user-facing-type-no-driver.png
	modified:   internal/docs/img/user-facing-type.png
	modified:   internal/website/content/concepts/structure/portable-type-no-driver.png
	modified:   internal/website/content/concepts/structure/portable-type.png
	modified:   internal/website/static/favicon-32x32.png
	modified:   internal/website/static/gh.png
	modified:   internal/website/static/go-cdk-logo-gopherblue-small.png
	modified:   internal/website/static/go-cdk-logo-gopherblue.png
	modified:   internal/website/static/go-cdk-logo-white.png
	modified:   internal/website/static/placeholder-logo.png
	modified:   samples/guestbook/blobs/aws.png
	modified:   samples/guestbook/blobs/azure.png
	modified:   samples/guestbook/blobs/gcp.png
	modified:   samples/order/testdata/cat1
	modified:   samples/tutorial/gopher.png

no changes added to commit (use "git add" and/or "git commit -a")

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/zchee/.cache/go/go-build"
GOENV="/Users/zchee/.config/go/env"
GOEXE=""
GOEXPERIMENT="arenas,cgocheck2,coverageredesign,heapminimum512kib,pagetrace"
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/zchee/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/zchee/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GOVCS=""
GOVERSION="devel go1.21-ebc2aaae24 Mon Mar 6 21:18:42 2023 +0000 X:heapminimum512kib,arenas,pagetrace,cgocheck2"
GCCGO="gccgo"
GOAMD64="v4"
AR="ar"
CC="/Applications/Xcode-14.2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang"
CXX="/Applications/Xcode-14.2.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++"
CGO_ENABLED="1"
GOMOD="/Users/zchee/go/src/gocloud.dev/go.mod"
GOWORK=""
CGO_CFLAGS="-O2 -g"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-O2 -g"
CGO_FFLAGS="-O2 -g"
CGO_LDFLAGS="-O2 -g"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/fb/04yhz5d96yg03xkcfzpjhjx40000gp/T/go-build1109073516=/tmp/go-build -gno-record-gcc-switches -fno-common"

[zchee]

/cc @vangent

[codecov]

Codecov Report

Merging #3239 (be41e58) into master (48680fe) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3239   +/-   ##
=======================================
  Coverage   77.34%   77.35%           
=======================================
  Files         103      103           
  Lines       13548    13548           
=======================================
+ Hits        10479    10480    +1     
+ Misses       2340     2339    -1     
  Partials      729      729           

Impacted Files	Coverage Δ
internal/retry/retry.go	88.23% <0.00%> (-11.77%)	⬇️
blob/s3blob/s3blob.go	89.71% <0.00%> (+0.27%)	⬆️
runtimevar/awsparamstore/awsparamstore.go	89.02% <0.00%> (+0.60%)	⬆️

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[zchee]

@vangent gentle ping.